How does diet affect creatinine levels?

A high-protein diet can temporarily increase creatinine levels, as protein metabolism produces more waste that the kidneys must filter. Conversely, a low-protein diet may lower creatinine levels. For accurate test results, it’s recommended to maintain a balanced diet and avoid consuming excessive protein-rich foods, such as red meat, before the test. Your doctor can provide specific dietary guidelines if necessary, especially if you have existing kidney issues or are at risk of kidney disease.